Autofellatio is the act of oral stimulation of one's own penis as a form of masturbation. While few human males are sufficiently well-endowed and/or flexible enough to perform the frontbend required, increased flexibility achieved via gravity-assisted positions, and physical training such as gymnastics, contortion or yoga may make it possible for some. Fewer than 1% of men can successfully suck or lick their own penises.

David: I pleased myself last night by means of autofellatio.
Sean: Gay...

Autofellatio is a sex act wherein a male performs oral sex on himself as a form of masturbation. This is impossible for most men, but can be achieved by one both sufficiently "well-endowed", and flexible enough to perform a severe frontbend. On the other hand, flexibility, and thus the likelihood of achieving this, may be increased by various activities including gymnastics or yoga.

The (presumed) equivalent act for a woman would be autocunnilingus, but would be more difficult to perform since the subject's head must move a greater distance. Unlike autofellatio, the existence of autocunnilingus is disputed.

Autofellatio has been featured in a few pornographic movies, although it is not one of the more popular subjects.

David Lorton, a translator, has speculated that one Egyptian poem contains an image that might best be interpreted as indicating a belief that the gods Shu and Tefnut were created by Atum (Ra) through an act of autofellatio. The far more common interpretation is that this creation was by masturbation.

In his semi-autobiographical novel The Hand-Reared Boy (1970), the writer Brian W. Aldiss describes group masturbation practices at a British boys' boarding school. One boy with an especially large penis is capable of fellating himself, a fact which the narrator, Horatio Stubbs, verifies.

The topic has also been used as the basis for comedy. Bill Hicks elaborated an oft-quoted riff on the subject of fellatio:

Autofellatio is a form of male masturbation where the male bends in half to suck his own penis. There is a few different positions. The "C" position in which he sits in a chair and with his hands under his legs, pulls himself up to suck himself. The "Backwards C" position is where lying on his back, he bends backwards and "walks" down the wall behind him to reach himself. The hardest of all is the "X" position. The autofellatior locks his feet behind his head to reach his penis. The "fact" that less than 1 percent of men can accomplish this is WRONG. The reason it is so low a number is that most men who were asked if they can said no, even though they can, out of embarrasment. Recent studies show that it has gone from 1 percent to 3 or 5 percent in the last decade. More men or comfortable with themselves to admit it. You do not have to be well-endowed, (have a big penis) to enjoy autofellatio, although it does help. It all depends on how flexible you are.